1. History of ophthalmology through the ages;Wheeler;Br J Ophthalmol,1946
2. The first ophthalmoscope? Adolf Kussmaul 1845;Mark;Arch Ophthalmol,1970
3. The early years of Helmholtz: In: Commemoration of the centenary of the invention of the ophthalmoscope;Chance;Trans Am Ophthalmol Soc,1950
4. Jaeger, about glaucoma;Blanchard;Doc Ophthalmol,1995
5. Ophthaloskopischer Handatlas;von Jaeger,1869